ISTG Text Meaning In English
ISTG Text translation, meaning, definition, explanation and examples of relevant words and pictures - you can read here.
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Meaning
ISTG stand for I Swear to God
Example
The acronym ISTG stands for "I Swear To God", with the phrase widely used in internet chat and text messages as a shorthand used to express extreme seriousness or annoyance or surprise, and is not used outside of a serious religious context.